1 OGSA and platform information services Hiro Kishimoto

2 Big Picture for OGSA information services Logging Service Message Broker Directory Service Scheduler Metering Service Supply side Resource Manager SupplierConsumer OGSI / WSRF Platform Services OGSA Services OGSA information services Platform information services extent use

3 Platform Information Services There are common supplier (or producer) and consumer services Core proposal from GMA group Requirements listed in Abdeslem’s doc Common interfaces which are extended (inherited) by higher level services SupplierConsumer OGSI / WSRF Platform Services Platform information services Extend

4 OGSA service extents platform information services Service A extents supplier service Service C extents consumer service Service B extents both supplier and consumer service BC A SupplierConsumer OGSI / WSRF Platform Services OGSA Services Platform information services extent use

5 Intermediary service (= OGSA information Service) Intermediary service has both supplier and consumer interface Each service has different semantics (pattern) described in Bill’s slides Each service has different QoS Logging Service Message Broker Directory Service SupplierConsumer Platform Services OGSA Services OGSA information services Platform information services

6 Use relations between OGSA services 1.“Resource manager” registers resource information into “directory service” 2.“Scheduler” retrieves available resource information from “directory service” 3.“Resource manager” logs usage records into “logging service” 4.“Metering service” collects usage records from “logging service” for billing Logging Service Message Broker Directory Service Scheduler Metering Service Supply side Resource Manager (1) (2) (3) (4)

7 Logging service Logging service is fully defined by Bill’s document Logging service extends both supplier and consumer interface Logging service has its special requirements and interfaces

8 Event OGSA Standard event schema is necessary to define –Based on the event schema defined by WSDM-TC and CMM-WG Logging service and message broker use OGSA event –No “event service”

9 Message plumbing Message service has two aspect Plumbing include reliable delivery is binding (transport) issue and is not OGSA service Additional messaging semantics is provided by “message broker” and is one of OGSA information service